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g100num [7]
3 years ago
12

Help solve this matrix question

Mathematics
2 answers:
Anna007 [38]3 years ago
7 0

Answer:

The correct answer is A -6/17

umka21 [38]3 years ago
7 0

Answer:

A

Step-by-step explanation:

Multiply each component of the matrices by the scalar, that is

\left[\begin{array}{ccc}-4a\\-4b\\\end{array}\right] = \left[\begin{array}{ccc}180\\-510\\\end{array}\right]

Equate corresponding elements, that is

- 4a = 180 ⇒ a = - 45

- 4b = - 510 ⇒ b = 127.5

Hence

\frac{a}{b} = \frac{45}{127.5} = - \frac{6}{17} → A

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answer and explanation below

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X+y=156
<span>0.05x+0.25y=21.6

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</span>1/20x+1/4y=216/10
<span>+--------------------------
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<span>
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this question answer is </span><span>87 nickels and 69 quarters</span><span>

</span>
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